<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
	<title>Conditional Execution in Pipelines | ElasticSearch 7.7 权威指南中文版</title>
	<meta name="keywords" content="ElasticSearch 权威指南中文版, elasticsearch 7, es7, 实时数据分析，实时数据检索" />
    <meta name="description" content="ElasticSearch 权威指南中文版, elasticsearch 7, es7, 实时数据分析，实时数据检索" />
    <!-- Give IE8 a fighting chance -->
    <!--[if lt IE 9]>
    <script src="https://oss.maxcdn.com/html5shiv/3.7.2/html5shiv.min.js"></script>
    <script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script>
    <![endif]-->
	<link rel="stylesheet" type="text/css" href="../static/styles.css" />
	<script>
	var _link = 'ingest-conditionals.html';
    </script>
</head>
<body>
<div class="main-container">
    <section id="content">
        <div class="content-wrapper">
            <section id="guide" lang="zh_cn">
                <div class="container">
                    <div class="row">
                        <div class="col-xs-12 col-sm-8 col-md-8 guide-section">
                            <div style="color:gray; word-break: break-all; font-size:12px;">原英文版地址: <a href="https://www.elastic.co/guide/en/elasticsearch/reference/7.7/ingest-conditionals.html" rel="nofollow" target="_blank">https://www.elastic.co/guide/en/elasticsearch/reference/7.7/ingest-conditionals.html</a>, 原文档版权归 www.elastic.co 所有<br/>本地英文版地址: <a href="../en/ingest-conditionals.html" rel="nofollow" target="_blank">../en/ingest-conditionals.html</a></div>
                        <!-- start body -->
                  <div class="page_header">
<strong>重要</strong>: 此版本不会发布额外的bug修复或文档更新。最新信息请参考 <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/index.html" rel="nofollow">当前版本文档</a>。
</div>
<div id="content">
<div class="breadcrumbs">
<span class="breadcrumb-link"><a href="index.html">Elasticsearch Guide [7.7]</a></span>
»
<span class="breadcrumb-link"><a href="ingest.html">Ingest node</a></span>
»
<span class="breadcrumb-node">Conditional Execution in Pipelines</span>
</div>
<div class="navheader">
<span class="prev">
<a href="accessing-data-in-pipelines.html">« Accessing Data in Pipelines</a>
</span>
<span class="next">
<a href="ingest-conditional-nullcheck.html">Handling Nested Fields in Conditionals »</a>
</span>
</div>
<div class="chapter">
<div class="titlepage"><div><div>
<h2 class="title">
<a id="ingest-conditionals"></a>Conditional Execution in Pipelines<a class="edit_me edit_me_private" rel="nofollow" title="Editing on GitHub is available to Elastic" href="https://github.com/elastic/elasticsearch/edit/7.7/docs/reference/ingest/ingest-node.asciidoc">edit</a>
</h2>
</div></div></div>
<p>Each processor allows for an optional <code class="literal">if</code> condition to determine if that
processor should be executed or skipped. The value of the <code class="literal">if</code> is a
<a class="xref" href="modules-scripting-painless.html" title="Painless scripting language">Painless</a> script that needs to evaluate
to <code class="literal">true</code> or <code class="literal">false</code>.</p>
<p>For example the following processor will <a class="xref" href="drop-processor.html" title="Drop Processor">drop</a> the document
(i.e. not index it) if the input document has a field named <code class="literal">network_name</code>
and it is equal to <code class="literal">Guest</code>.</p>
<div class="pre_wrapper lang-console">
<pre class="programlisting prettyprint lang-console">PUT _ingest/pipeline/drop_guests_network
{
  "processors": [
    {
      "drop": {
        "if": "ctx.network_name == 'Guest'"
      }
    }
  ]
}</pre>
</div>
<div class="console_widget" data-snippet="snippets/1054.console"></div>
<p>Using that pipeline for an index request:</p>
<div class="pre_wrapper lang-console">
<pre class="programlisting prettyprint lang-console">POST test/_doc/1?pipeline=drop_guests_network
{
  "network_name" : "Guest"
}</pre>
</div>
<div class="console_widget" data-snippet="snippets/1055.console"></div>
<p>Results in nothing indexed since the conditional evaluated to <code class="literal">true</code>.</p>
<div class="pre_wrapper lang-console-result">
<pre class="programlisting prettyprint lang-console-result">{
  "_index": "test",
  "_type": "_doc",
  "_id": "1",
  "_version": -3,
  "result": "noop",
  "_shards": {
    "total": 0,
    "successful": 0,
    "failed": 0
  }
}</pre>
</div>




</div>
<div class="navfooter">
<span class="prev">
<a href="accessing-data-in-pipelines.html">« Accessing Data in Pipelines</a>
</span>
<span class="next">
<a href="ingest-conditional-nullcheck.html">Handling Nested Fields in Conditionals »</a>
</span>
</div>
</div>

                  <!-- end body -->
                        </div>
                        <div class="col-xs-12 col-sm-4 col-md-4" id="right_col">
                        
                        </div>
                    </div>
                </div>
            </section>
        </div>
    </section>
</div>
<script src="../static/cn.js"></script>
</body>
</html>